182 Comparative Animal Physiology 



37. Claus, C, Grobben, K., and Kuhn, F., Lehrbuch der Zoologie (1937). Ch. 4, 

 pp. 124-136. Berlin, Springer. Anatomy of digestive tracts. 



38. Cleveland, L. R., Quart. Rev. Biol. 1:51-59 (1926). Symbiosis of termites and 

 intestinal flagellates. 



39. Cleveland, L. R., Biol. Bull. 54:231-237 (1928). Symbiosis between termites 

 and intestinal protozoans. 



40. Cleveland, L. R., Hall, S. R., et al., Mem. Acad. Arts & Sci. 17:185-342 

 (1934). Symbionts in wood roach, Cryptocercus. 



41. Dawes, B., /. Mar. Biol. Ass. U. K. 17:75-102 (1930). Absorption of fats in 

 plaice Pleuronectes. 



42. DiCKMAN, A., /. Cell. & Camp. Physiol. 3:223-246 (1933). Digestion of wax 

 by waxmoth larvae. 



43. DoBREFF, M., Pfliig. Arch. ges. Physiol. 217:221-234 (1927). Gastric secretion 

 in elasmobranchs. 



44. DoRE, W. H., and Miller, R. C, Univ. Calif. Puhl. Zool. 22:383-399 (1923). 

 Digestion of wood by Teredo. 



45. Doyle, W. L., Nature 144:867 (1939). Amylase in Amphioxus. 



46. Doyle, W. L., and Patterson, E. K., Science 95:206 (1942). Origin of pepti- 

 dase in Didinium. 



47. Dukes, H. H., The Physiology of Domestic Animals. (1942). Ithaca, N. Y., 

 Comstock Pubhshing Co., 721 p. pp. 217-226, Digestion. 



48. DuspivA, F., Ztschr. vergl. Physiol. 21:632-641 (1934). Utilization of wax by 

 Galleria. 



49. DuspivA, F., Ztschr. Physiol. Chemie 241: 168-176, 177-200 (1936). Protein 



digestion by clothesmoth and waxmoth. 



50. Elsden, S. R., /. Exper. Biol. 22: 51-62 (1945). Acid formation in sheep rumen. 



51. EvENius, J., Arch. Bienenk. 7:229-244 (1926). Enzymes of digestive tract, 

 honeybee. 



52. Earner, D., Biol. Bull. 84:240-243 (1943). Biliary amylase, fowl. 



53. Florkin, M., L'Evolution Biochemique (1944). Paris, Masson, 210 p. Com- 

 parison of intracellular and extracellular digestion. 



54. Fox, D., Marks, G. W., et al., Bull. Scripps Inst. Oceanog. 4:1-64 (1936). 

 Digestion by style of Mytilus. 



55. Fraenkel, G., ;. Exper. Biol. 17: 18-29 (1940), also Nature 137:237-238 (1936). 

 Utilization of sugars by adult blowflies. 



56. Frazer, A. C, Physiol. Rev. 20:561-581 (1940). Mechanisms of fat absorption, 

 mammals. 



57. Friedman, M. H., /. Cell. & Comp. Physiol. 5:83-95 (1934), ibid. 10:37-50 

 (1937). Nervous control, drug effects, gastric and esophageal secretion, frog. 



58. Fruton, J. S., Irving, G. W., and Bergmann, M., /. Biol. Chem. 141:763-774 

 (1941). Classification of cathepsins. 



59. G^A^TZ, E., Zool. ]ahrh., Aht.allg. Zool. U.Physiol. 46:375 412(1929). Digest- 

 ive enzymes, pulmonates. 



60. Graetz, E., and Autrum, H., Ztschr. vergl. Physiol. 22:273-283 (1935). Pro- 

 tein-digesting enzymes of leeches. 



61. Graham, A., Proc. Roy. Soc. Lond., B. 108:84-95 (1931). Digestion in Pecten. 



62. Graham, A., Tr. Roy. Soc. Edin. 57:287-308 (1932). Digestion by limpet. 

 Patella. 



63. Hasler, a. D., Biol. Bull. 68: 207-214 (1935), ibid. 72:290-298 (1937). Diges- 

 tion by cladocerans and copepods. 



64. Hassett, C. C, Biol. Bull. 95: 1 14-123 (1948). Utilization of sugars, Drosophila. 



65. Heatley, N. G., ;. Exper. Biol. 13:329-343 (1936). Digestive enzymes of 

 Peripatopsis (Onychophora). 



66. Herzog, R. O., and Gonell, H. W., Ztschr. Physiol. Chem. 141:63-67 (1924;. 

 Cellulose in Phallusia and Molgula. 



67. HiRSGH, G. C, and Jacobs, W., Ztschr. vergl. Physiol. 8: 102-144 (1938), ibid. 

 12: 524-558 (1930). Secretory cycle and digestive glands, Astacus. 



68. HoBSON, R. P., ;. Exper. Biol. 8:109-123 (1931). Digestion in blowfly larvae. 



69. Holter, H., and Doyle, W. L., ;. Cell. & Comp. Physiol. 12:295 308 (1938). 

 Amylase and peptidase of amoeba and Paramecium. 



